"Full of mischief" is an expression that describes a person who loves to cause trouble or engage in mischievous behavior. If you're looking for some synonyms to describe this trait, there are plenty of options to choose from. Some common alternatives include "impish," "naughty," "prankish," "mischievous," "rascally," "rogueish," "troublesome," "ornery," and "devilish." Each of these words conveys a similar sense of playful misbehavior, and can be used to describe someone who is always up to something. Whether you're writing a story or describing a person you know, these synonyms for "full of mischief" can help you find just the right words to capture their personality.